Bolting is

  • Internode elongation just prior to flowering

  • Internode elongation just after flowering

  • Reduction in stem length just prior to flowering

  • Reduction in stem length just after flowering

Which of the following PGRs have isolated from autoclaved herring sperm DNA?

  • Cytokinins

  • Gibberellins

  • Auxin

  • Ethylene

Which of the following occurs naturally in plants?

  • Kinetin

  • NAA

  • IBA

  • 42,4 D

Which of the following figure depicts Apical Dominance?

  • c

  • a

  • Does not belong Apical Dominance

  • The information is insufficient to predict

Zeatin

  • Isolated from herring sperm

  • Isolated from coconut milk and corn Kernels

  • Isolated from corn Kernels

  • Isolated from rice seedlings

Natural Cytokinins are not found in

  • Root apices

  • Developing shoot buds

  • Young Fruits

  • Root hair zone

Cytokinins

  • Helps to produce new leaves

  • Helps to produce chloroplasts in leaves

  • Lateral shoot growth, Adventitious Shoot Formation

  • All of these

Cytokinin

Which of the following is not correct?

  • Help to overcome apical dominance

  • They promote nutrient mobilisation and helps in the delay of leaf senescence

  • Lateral Shoot Growth

  • Formation of Tap root

Which of the following hormones is synthesised in large amounts by tissues undergoing senescence and ripening fruits?

  • Ethylene

  • ABA

  • Auxins

  • GA3

Influences of Ethylene in plants do not include

  • Horizontal growth of seedlings

  • Swelling of the axis

  • Apical hook formation in dicot seedlings

  • Lateral shoot growth

Ethylene does not perform

  • Promotes senescence and abscission of plant organs especially of leaves and flowers

  • Highly effective in fruit ripening

  • Enhances the respiration rate during ripening of the fruits

  • Overcome the apical dominance

The rise in respiration rate of fruit is called

  • Respiratory quotient

  • Respiratory climactic

  • Respiratory incision

  • Respiratory succulence

Respiratory climactic is due to

  • Ethylene

  • ABA

  • GA

  • Auxins

The function which is not performed by Ethylene is

  • Breaking of seed and bud dormancy

  • Initiates germination in peanut seeds

  • Improving the internode length of sugarcane

  • Promotes rapid internode and petiole elongation in deep water rice plants

Sprouting of potato, helping the leaves or upper parts of the rice shoot to remain above water, promotes root growth and root hair formation and helping plants to increase their absorption surface. Which of the following hormones is involved in such physiological effects?

  • Ethylene

  • ABA

  • GA

  • Auxins

Ethylene is not involved in which of the following physiological effect?

  • Initiate flowering and for synchronising fruit-set in pineapples

  • Induces flowering in mango

  • The most widely used PGR in agriculture as regulates so many physiological processes

  • Help overcome the apical dominance

Which of the following does not has two kinds of varieties?

  • Wheat

  • Radish

  • Barley

  • Rye

The spring varieties are normally planted in…...and come to flower and produce grain……

  • Autumn season, after the end of growing season

  • Spring season, at the end of growing season

  • Spring season, before the end of growing season

  • Autumn season, at the end of growing season

Winter varieties should be planted in

  • Winter

  • Autumn

  • Spring

  • Summer

Winter varieties are harvested in

  • Autumn

  • Mid summer

  • Mid Winter

  • Spring

Winter varieties resume their Growth in

  • Spring

  • Summer

  • Winter

  • Autumn

Biennial plants are

  • Monocarpic plants

  • Flower for two seasons

  • Flower in first season

  • All of these

Which of the following is not an example of of biennial plants?

  • Sugarbeet

  • Cabbage

  • Carrots

  • Rye

Seed Dormancy is

  • Controlled by external environment

  • Controlled by endogenous conditions

  • Controlled by external environment and as well as endogenous conditions

  • Controlled by external environment only

Which of the following is not a reason of seed being dormant?

  • Impermeable and hard seed coat

  • ABA

  • Phenolic Acids, Para Ascorbic Acid

  • External temperature

Seed Dormancy

Find the incorrect statement.

  • Can be caused by immature embryos

  • Can be overcome by natural means and various other man made measures

  • ABA has no effects over seed Dormancy

  • GA can overcome seed Dormancy

Which of the following cannot overcome seed Dormancy?

  • GA

  • Nitrates

  • Changes in environmental Conditions

  • Phenolic Acids

Seed coat barrier in some seeds cannot be broken by

  • Vigorous shaking

  • Mechanical abrasions using knives, sandpaper

  • Chilling conditions

  • Microbial action

Effect of inhibitory substances cannot be removed by…..in order to overcome seed Dormancy.

  • Chilling conditions

  • Application of GA

  • Application of Nitrates

  • Application of Para-ascorbic acid

Which of the following is not a natural mean to remove seed coat?

  • Microbial action

  • Passage through Digestive tract

  • Vigorous shaking

  • Both B and C

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